Brake.



W. W. ROACHL' BRAKE.

APPLICATION FILED mm. 3!. 19H.

Patented Sept. 3. 1918.

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after we q w fw, ROACH.

BRAKE.

APPLICATION FILED M R-.31, 19H.

5 snzus su zn 2.

Patented Sept.

W AkuwW W. W. ROACH. BRAKE APPLICATION FILED MAR. 31. I981.

PatentedSept. 3, 1918.

5 SHEETS-SHEET 3.

W. N. HOACH.

BRAKE.

APPLICATION mm MAR-31,1917.

1,278,081. PatentedSept. 3,1918.

7W I v W. 'W. ROACH BRAKEL APPLICATXON H120 Inn. 31. m1.

1,278;0s1. 'PatentedSept. 3,1918.-

5 SHEETS-SHEET 5 ant all @rhom, it may concern. Be it known that I, W'ILIJAM \V. RoAr'n,

I aeitjzen of the United States. residing at, -Thiladelphia', in, the eounty ot'lhiladelplna tate of;Pennsylvania, have invented fyre nil g iseful T nprorements in, Brakes. of lrielrthefollowing is a specification.

'Th' intention relates to brakes and conin' the in iprorenuuits hereinafter de- 1 land claimed. It is designed partieu- CL-and when any of-the friction jo t thel1rake need renewal, it is only rv to remove the wheel. wherevn 'i 1 1 in Qtll he. un mbersare directly aeressllr efdy loyal and replai'ement.

l ln' l) i embodiment of my invention, the Ew n "kt r "lli tike'is double that 1s,,\-omprises two sets 01' nmi-rotatable frielion members of different gl iameter, eoijlnn'atz-ing with one and the --"silli otary member, thereby m effort. proum b1 1kes.. one stronger than the d whieh ranb'e indepeiulently opa' )y :Ll OUl' peglal and a hand lever '1 i iod |ti(rat-ions are. illustrated in a. a n I be ng. an end \fi-ewand eetionyon the l ne, 2 2 an" an eiuly e w I et ton. on the line -t----4 ot Fig.1

ion on the line -53 of Fig. l,

t ion. on the line 7-7 of Fig. (3;

partntlend new at another an elevation ain tpartial. section of Fig, 10a sect ion of the same on 1; STATES PATENT OFFICE.

shaft. being part of the frame, 2'. e.,,of

WILLIAM W. ROACH, OF PHILADELPHIA, PENNSYLVANIA.

BRAKE.

Patented Sept. 3, 1918.

3 i k A ncaaon filedllarch 31,1917; Ser1alNo.158,854.

applied to the wheel of a motor vehicle, 1 representing such wheel and 2 its driving the fixed rear axle. To the hub of the Wheel is secured a eireular plate 5, the'edge ofwvhieh is flanged and overlaps, or is overlapped by. the flange of a similar plate 6, seeured'to thestationary i'nenlber Said flanged plates constitute a easing 'or housing for the brake. The brake eom n'ises, as usual, a rotary, member or members and a non-rotatable member orinembers. In the present instant-e. it being: a disk brake, there.

isalways one or more non-rotatable nrembenthan rotarymembers. For simplieitys sake. I have shown only one rotary member but, of eourse, there may be two or more such, and a eorrespondingly increased number of non-rotatable members.- The rotary member is an annular disk 3, which is sup ported and caused to rotatewith' the wheel by means of studs:t),--preferablythree in number as shown.seeured in the plate 5 and passing through holes in said disk. In

the forms shown in Figs. 1 and Z and in .l igs. t3 and T. the holes for the studs are formed in lugs 10 projerting outwardly from the periphery oi" the disk. The non rotatable members of the eluteh consist of rings 11. t'ared with asbestos or the like as.85

indicated at 12. and arranged one on each side of the. disk 8. These rings are supported on bolts It ot which there are also three.-mounted in the stationary plate6 v and passing through lugs 15 projecting i'n- \rardlyi'rom the inside of the rings. The

inner .ends of said bolts are provided with nuts to take-thethrustof'the brake, and with washers to permit adjustment of the distance of the farther ring from the plate 6. The ring on the rear side of the disks slides on the bolts 'l-l. Springsilti. shown only in Fig. t, may be used to hold the rings and disk apart; when the brake is not in use.

Various means may be employed to apply the lnrake, but in all the forms illustratedit he notion is to first more lhe ri nginei the fixed plate against the diskwuiil; then the lalteraga-inst the farther ring n Figs/1 tllltl.f... this means ronsisl's of ilieli'ned rams or wedges '17, formed oii "t late 6 whieh art. upon rounded pro ertie 18 l'ormed m .the bark iii" a ranr disk' lo. the lave ol"\\'hi('h hears agalnst the back of the nearer ring 11. The eam disk is provided with three slots 19 by which it. is supported on the studs 14. It is oscillated by means of a stud 20, secured to its back and passing through a slot. 21 in the plate ti. A rod 22 connects said stud to the operating lever or pedal, not shown, and a spring 23 retracts said rod and stud to release the brake.

In the form illustrated in Figs. 3, 4 and 5, the plates 5 and 6 are on'iitted, the studs (not shown) for connecting the rotary disk 8 to the wheel being secured in the holes 25 formed in the flange of the wheel hub, while the bolts 14, (here shown as four in num ber), carrying the nonrota-table friction rings 11, are carried in the outer ends of the arms 26 of a s])i('ler, secured to the fixed rear axle tube 3. In this instance, it will be noticed that the rings are supported at their outer periphery and the disk at its inner periphery. In Fig. 4 is shown a coil spring 56 normally holding the rings away from the disk.

The eamming action, to apply the brake, is here performed by an oscillatable disk 27, provided on both sides with rounded cam projections 28, which bear on one side on wedges 29, formed on the back of the adjacent friction ring, and on the other side, on the inner inclined face of a U-shaped clip 30,-of which there are four as shown, secure-ii an "onvenient way to the frame, or to the farther friction ring. The means for oscillating the disk is here shown as a crank 31, the pin 82 of which plays in a slot 33 in said disk, the crank being journaled in one of the spider arms 26 and having a lever arm 34 by which it can be rotate-d.

In the torn) shown in Figs. (3 and 7, I do away withthe cam disk and actuate the brake by means of links constituting a toggle, and secured at one end to the stationary plate 6 and at the other end to the dished. center portion of the nearer friction ring 11. The toggle operated by a crank lever 36, journaled in. the plate ('3' and con nected to the center of the toggle links by rods 37. 22 is the connecting rod and 23 the retracting spring, as in the form of Figs. 1 and 2.

A modified n'ieans for operating the togglee is shown in Fig. 8. l-lere the rods 37 are connected to a yoke 38, within which is an eccentric disk 39 carried by the lever 36. In thiscase bot-h sets of toggle links are straightened by an upward pull, whereas, in

the form-of Figs. 6 and 7, one set is straighte'ned by an upward pull and the other set by a downward push.

In Figs. 9 and 10, the farther friction ring is not dished and is forced toward the friction disk 8 by cams 40, pivoted on the stationary axle tube 3 and actuated by the lever 66 and rod 22, the end of said lever being forked t0 straddle said tube.

Figs. 11, 12 and 13 illustrate the double form of brake, in which there is one rotary disk 8, as before, but two sets of cotiperating friction rings 44, and 45. The outer rings 44 are supported by the bolts 14, mounted in the fixed plate (3 and passing through lugs 46 on the outer periphery of said rings, while the inner rings 45 are supported on similar bolts 14, passing through lugs 47 formed on their inner periphery. The studs 9, for coneeting the rotary disk 8 to the wheel, lie in the space between the outer periphery of the rings 45 and the inner periphery of the rings 44.

To actuate the brakes independently, two oscillatable cam rings 48 and 49 are provided, the outer one of which, 49, is slotted at 50 to receive the outer bolts 14, and the inner of which is slotted at 51 to receive the inner bolts 14. Studs 52 and 53 are connected respectively to the backs of said cam rings, pass through slots in the fixed plate 6 and carry connecting rods 22, one of which-that from the outer diskis preferably connected to a foot pedal not shown, and the otherthat from the inner disk, to a hand lever not shown. In this way there is provided a relatively weak brake for hand operation and a more powerful brake,owing to the greater dian'ieter of the friction surfaces, actuated by a pedal.

Naturally, any of the other actuating means hereinbetore descril'ied can be used for the double brake in place of the cam disks, but the latter appear to be the most convenient to use therewith.

W'hat, I claim is:

1. A brake for motor vehicles comprising the combination with the wheel, of an annular disk connected to rotate with said wheel but fr e to move axially, a non-rotatable friction ring on each side of said disk, one of which can move axially and the other of which is held against axial movel'i'ient. away from said disk, an annulus, mount-ed in the rear of said axially movable ring so as to be capable of a limited circular move ment, and provided with cam projections on its face, coo 'ierating cam surfaces on a fixed part of the vehicle, and means, under control of the operator, to oscillate said an-' nuJus.

2; A brake for motor vehicles comprising the ombination with the wheel, of flanged plates connected to said wheel and to the trame respectively, the flange of one plate overlapping that of the other'so as .to forma casing for the brake, an annular disk within sa id easing, studs projecting from the wheel plate through said disk, a friction ring on each side of said disk within said studs, bolts projecting from the frame plate through said rings within said disk, nuts on the inner ends of said boltsto hold the farther ring from movement toward the 1,27a,oa1 w wheel, and means between the other of said rings and the frame plate to force the last mentioned ring against said disk andthe latter against the farther ring.

3. A brake for motor vehicles comprising the combination, with thewheel, of an an nular disk connected to rotate with said wheel but free to move axially, studs carried by the wheel and ')ro'iecting through said disk, a pair of outer friction rings flanking said disk outside said studs and a pair of inner friction rings flanking said disk within said studs, means to support said pairs of rings from a stationary part of the vehicle, and independent means between a stationary part and one of each pair of said rings'to force said ring against said disk and the latter against the other ring of that pair.

l. A .brakc for motor vehicles comprising); the combination, with the wheel, of flanged plates connected to said wheel and to the frame. respectively. the flange of one plate overlapping that of the other so as to form a casing for the brake, studs projecting froin the wheel plate into said casing, an annular disk slidably supported on said studs, bolts projecting from the frame plate into said casing, friction rings mounted on said bolts on each side of said disk, and means, under the control of the operator, to force said rings and disk into contact.

i\ friction brake comprising the combination with a driven shaft and a frame member in which the same is mounted, of llangcd plates on said shaft and frame member. respectively, the tlanges'extemling in opposite directions from said plates so as to form a casing, annular frictiondisks within said casing, one or more of which is connccted to rotate. with said shaft, the others being nonrotatably carried by the frame, and means connected to said frame member and bearing on the adjacent non-rotatable disk to force the latter away from said member and apply the brake.

ti. A friction brake comprising the combination with adriven shaft and a stationary part, of a rotary friction member secured to said shaft, a non-rotatable friction member supported by saidstationary part. so as to be movable axially, means to hold said rotary member against axial movement away from said non-rotatable member, a cam disk supported by said stationary part so as to have a limited turning movement, cam surfaces on the face of said disk whereby, when it is turned in one direction, it is forced against the back of said non-rotatable, member, and manual means for turning said disk. i

7. A double friction brake for motor vehicles and the like, comprising the combination with the fixed rear axle, the driving shaft therein. and the Wheel connected to said shaft, of flanged plates connected to the wheel and to the axle respectively so as to form an int-losing housing, a circular set of studs projecting inwardly from the wheel plate, two circular sets of bolts projecting inwardly from said axle plate, a friction disk slidably supported on said studs, independent pairs of friction 1'ings,tliosc of each pair being on opposite sides of said disk, slidably mounted on said bolts, nuts on. the

inner ends of said bolts to resist the thrust on said rings. means mounted between the axle plate and the nearer of the outer pairs of rings to force the latter against said disk, connections whereby said means is actuated by a foot pedal, similar means between said plate and the nearer ofthe' inner pair of rings to force the latter against said disk, and connections whereby said last mentioned means is actuated by a hand lev'er,

In testimony whereof I have hereunto set in hand.

3 WILLIAM lV ROACll, 

